双中继和三中继线圈位置参数对无线电能传输功率的影响

提出使用带多个中继线圈的电磁谐振式无线电能传输技术来解决智能电网中高压侧电子设备的供电可靠性和稳定性问题。建立了多中继线圈无线电能传输的理论模型,给出了线圈互感、负载功率和传输效率的计算方法,对双中继和三中继情况下线圈间距变化时的负载功率和传输效率及总距离一定时中继线圈位置的变化对传输功率的影响进行了仿真计算,得到了负载功率最大时的线圈位置和对应的传输效率,并进行了实验验证。结果表明,双中继和三中继时,中继线圈能够大大提高传输的功率、效率和距离;负载功率最大时,中继线圈位置并非等距排列,对不同参数的系统需要进行仿真计算和实验来确定中继线圈的最佳位置。

The Influence of Coil Location Parameters to Load Power in Wireless Power Transmission with Two or Three Relay Coils

The magnetically-coupled resonant wireless power transmission(MCR-WPT)with multi relay coils is used to solve the problem of the power supply reliability and stability for the intelligent high voltage equipment in smart grid.The mathematics model of MCR-WPT with multi relay coils is found and the calculation algorithm of the coils mutual inductance,the load power and transmission efficiency is given.With two or three relay coils,the load power and transmission efficiency when the clearance between coils is changed and the relationship between the relay coils′position and transmission power are simulated and the coils′position and transmission efficiency are found when the load power is biggest.The simulation and experimental results show that two or three relay coils can improve significantly the load power,transmission distance and transmission efficiency,the coils′position is not isometric arrangement when the load power is biggest,and the best arrangement for coils should be simulated and tested for different power transmission systems.